The shared source licence being drawn up as part of the RISC OS Open project is in the hands of lawyers, it was revealed this week. In a report to be published by Archive magazine, Castle are said to have spent a 'lot of money' on legal bills to make the licence watertight. The company fears loopholes may be found in their complex shared source agreement which could allow royalty free use of the source code for commercial purposes or let people avoid disclosing updates to the RISC OS blueprints.